Electrically controlled clutch



March S, 1953 c. E. MORGENSTERN ,197.

ELECTRICALLY CONTROLLED CLUTCH Filed Aug. 1, 1946 5 Sheets-Sheet l fivz enfar fiarlesE/Vayerzsie rn March 3, 1953 c. E. MORGENSTERN ELECTRICALLY CONTROLLED CLUTCH Filed Aug 1, 1946 5 Sheets-Sheet 2 AGITATOR SOLENOID nuMP scum/n March 3, 1953 c E. MORGENSTERN 2,630,197

ELECTRICALLY CONTROLLED CLUTCH Filed Aug. 1, 1946 5 Sheets-Sheet 3 H En Zbr Charles Ef/foryemtern March 3, 1953 c. E. YMORGENSTERN 2,630,197

ELECTRICALLY CONTROLLED CLUTCH Filed Aug. 1, 1946 5 Sheets-Sheet 4 57/527227? 'fidrles E /yoyemfern March 3, 1953 c. E. MORGENSTERN ELECTRICALLY CONTROLLED CLUTCH 5 Sheets-Sheet 5 Filed Aug. 1, 1946 Cfizirles E/Yayezzslkm Patented Mar. 3, 1953 2,630,197 ELECTRICALLY CONTROLLED CLUTCH Charles Everett Morgenstern, St. Joseph, Mich., assignor to Whirlpool Corporation, St..Joseph,

Mich, a. corporation of New York Application August 1, 1946, Serial No. 687,766

This invention relates to a washing machine control means and more particularly to an electrically controlled means and an electrical control therefore selectively controlling the operation of component parts of a wringer type wash ing machine. I

In the operation of a domestic wringer type washing machine to wash'the clothes, wring the clothes and to drain wash water from the wash tub, different component parts of the washing machine are brought into play. As some of these component parts, when operating, may interfere with the operation of other component parts, if actuated concurrently therewith, it is important that proper selective operation of the various component parts he obtained. Furthermore, when a certain part of the washing machine is to be brought into play, a dependable means should be provided to bring the part into play quickly and positively.

With the above requirements in mind, I provide a novel washing machine control means which enables proper selective action of the agitator, i e., the part that moves the clothes through the wash water during the washing operation, the wringer, and the drain pump in a wringer type washing machine to be obtained. Although the wringer can be operated when the agitator or drain pump is operating, normally the wringer will be operated alone and my control mechanism provides for such action. No

motion is imparted to the agitator when the drain pump is in operation to drain wash water from the wash tub. Motion of'the agitator during the wringing operation is unnecessary while such motion might result in overloading the agitator driving mechanism whenwater is being drained ofi by the drain pump if clothes are left in the wash tub and become wrappedaround the agitator. My control means also :causes quick and positive engagement of parts of a washing machine, such as the agitator and the drain pump, with a driving member, such as a motor, or quick and positive disengagement of the parts therefrom.

It is an object of the presentinventionto provide a new and improved control means fora washing machine.

Another object of the present inventionis to provide a new and improved control means for not only controlling action of parts of a washing machine but also for selectively'controlling such action.

A further object of the present invention is to provide anew and improved electrical: control 4 Claims. (01. 192-0) circuit, and timer associated therewith, for selectively controlling the action of various parts of a washing machine.

A still further object of the present invention is'to' provide a new and improved electrically actuated means for positively moving elements of a'wa'shing machine'into and out of engagement with a motive source;

Another and further object of the present invention is to provide a new and improved sole noid actuated engaging means, and lost motion mechanism operating in connection therewith, whereby an impact force is produced to move selected elements of a washing machine.

These and other objects and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the attached drawings in which:

Figure 1 is a front elevational view of a portion of a washing machine with the casing shown in cross section to expose a driving motor and the mechanism driven thereby;

Figure 2 is a plan view taken on line IIII of Figure 1 and shows the driving motor and parts of the control mechanism together with the supporting structure therefor;

Figure 3' is an enlarged plan view of the central portion of Figure 2 and shows in greater detail the linkage controlled by solenoids to couple to the driving motor elements of the washing machine driven thereby;

Figure 4 is a front elevational view of the portion shown in Figure 3 and shows the pump solenoid in deenergized position;

Figure 5 is a view similar to that of Figure 4 but shows the pump solenoid in energized position;

Figure 6 is a side elevational View taken along line VIVI of Figure 4,

Figure 7 is an elevational view taken along line VII-VII of Figure 3 and shows the action of theagitator solenoid in disconnecting the agitator from the driving motor; and

Figure 8 is a diagrammatic showing of an electrical control circuit for'o'otaining selective action of elements of a washing machine.

- In the embodiment of my invention illustrated in the drawings. andreferring more particularly toFigures 1 and 2. I provide a driving motor Ii! normally connected to an a itator drive shaft .li: a solenoid l2 and lin age I3 associated therewith for disengaging the agitator drive shaft it from the driving motor Ill at the end of the ash cycle; and a drain pump i. and a solenoid l5 and associated linkage I 6 for connecting the dra n pump lito the driving motor Ill when it is desired to drain water from the wash tub II. Electrical energy is supplied to the driving motor Ill, solenoid I2, and solenoid I5 through the indicated leads I8, I9, and 20. The sequence of energization of the parts just referred to is controlled by a switch member 2| mounted on the washing machine casing 22 and having leads 23 connected to said switch. For simplicity of illustration, the wiring connections between the switch 2|, the driving motor I and the two solenoids I2 and I5 have been omitted in Figures 1 through 7. However, the connections between these elements and from these various elements to a source of electrical power are clearly shown in Figure 8.

Referring again to Figures 1 and 2, a support member H6 is shown as extending diametrically from wall to wall of the washing machine casing 24, and is secured to the inner side of said casing at III and H2. This support is shown as including an arm 25, another arm 28, and a bracket portion 21 which includes arms 28 and 29, said arms straddling and supporting the driving motor I0. Thus, I show the driving motor I0 as being supported in a substantially horizontal position within the washing machine casing 24 and beneath the washing machine tub I'I.

Through suitable gear connection, not shown since the exact type of such connection is not critical to the practice of the present invention, oscillating motion is imparted to a gear member 30, see Figure 7, by the driving motor It. The gear member 30 is a hollow gear construction, i. e. a gear collar, and the agitator drive shaft |I extends through the central opening therein. Thus, this gear member is rotatable about the shaft II and is therefore movable around said shaft unless the gear is held against such rotation or movement by some retaining member. Normally, the gear 30 is restrained from turning about the shaft II by the engagement of the Walls of a slot 3| in a hub 32 carried by said gear with a pin 33 rigidly attached to and projecting from the shaft II. Since the hub 32 is rigidly connected to gear 30, it is movable with the gear to oscillate the shaft II in response to movement of the gear. In turn, the agitator drive shaft II, which is shown broken away in part in Figure 7, actuates the vaned agitator 34 which is movable within the tub II. In this manner, when the driving motor is energized and the gear 30 is normally engaged to the shaft II, the agitator 34 is driven to swirl the clothes within the wash tub I I and thus wash them.

At the end of the desired washing period, say to minutes, the agitator 34 will normally be stopped so that the wringer can be brought into operation without having the agitator in motion. Of course, if desired, the wringer can be operated when the agitator is in motion. Insofar as the wringer is concerned, I do not illustrate this part of the washing machine but merely show, in Figure 2, a wringer drive shaft 35 which is driven, through suitable gearing, by the driving motor I0 whenever the motor is energized. However, even though the driving motor I!) is still energized, the agitator 34 should be disconnected therefrom at the end of the washing period and the mechanism for accomplishing this desired result is best shown in Figures 2, 3 and 7.

At the end of the washing cycle, the solenoid I2 is energized either manually or automatically, as by a timer. The solenoid I2 has a vertically movable plunger 36 which is pivotally connected at 31 to a link 38. Link 38 has a slot 39 at one end thereof. A projecting pin 40, aflixed to one end of a lever 4| rests within the slot 39 and is normally held against the lower end of said slot by a spring 42 as is illustrated in Figure '7. The lever 4! is pivotally mounted intermediate its ends, as is illustrated at 43 in Figure '7. At its other end 45, the lever 4! is pivotally connected to a pin 46 extending diametrically through the upper end of a shaft member 44. Shaft 44 is movable axially within a journal member 4'. and has rigidly affixed thereto a forked or yoke member 48, the forked arms of which extend on either side of the agitator drive shaft II. As is illustrated in dotted outline in Figure 3, the forked arms 49 and 50 straddle the drive shaft II. These arms are also positioned so that they can abut against a flanged collar portion 5| which is rigidly affixed to the gear member 30. The flanged collar portion 5| is movable, as a unit, with gear member 30 axially along shaft II in response to movement of the yoke member 48.

As has been previously stated, the projecting pin 40, affixed to an end of lever 4|, normally rests against the lower end of slot 33 in link The projecting pin 40 is biased to this position by spring 42. In order to offset the action of spring 42 in maintaining the projecting pin it} against the lower end of the slot 39 when link 38 is moved downward, a countering spring 52 is provided. One end of this spring 52 is connected to lever pivot 43 and the other end of this spring abuts against a projection 53 on lever 4| to urge the end of this lever to which the projecting pin 40 is attached, upwards against the action of spring 42. Of course, spring 52 is of insufiicient strength to completely counterbalance the biasing action of spring 42 but spring 52 does provide enough counterbalance so that when link 33 is moved downward in response to movement of the solenoid plunger 36 the projection 40 will not travel downward fast enough, in response to the action of spring 42, to avoid being struck by the upper wall 54 of slot 39. Also, the spring 52 provides a bias normally maintaining the end 45 of lever 4| down and thus maintaining the gear collar 38 in engagement with the agitator drive shaft II when the agitator control solenoid I2 is deenergized.

The sequence of action of the parts just described is as follows. Solenoid I2 is energized and the solenoid plunger 36 is moved downward. This causes the link 38, which is pivotally connected to the solenoid plunger 36 at 3'! to also move downward. When this occurs, the upper wall portion 54 of slot 39 in link 38 strikes projection 40 on lever 4| with an impact thereby forcibly pivoting lever 4| about its intermediate pivot point 43. End 45 of lever 4| is, therefore, raised and, since shaft 44 is pivotally connected to end 45 of lever 4|, this shaft is likewise raised. Movement of shaft 44 causes movement of yoke member 48 and, since this movement is upward, the forked arms 49 and 50 of yoke 48 engage the flanged collar portion 5| thus raising this collar portion and the gear 30 rigidly connected thereto axially upward along shaft II. Such upward movement uncouples gear member 30 from shaft since the walls of slot 3| in hub 32, which is rigidly attached to gear 30, are raised out of contact with projecting pin 33 on shaft When gear member 30 is raised, it and its associated elements 32 and 5|, oscillate freely about shaft II in response to the action of driving motor I0.

When the solenoid I2 is energized and the gear 30 is thus raised out of engagement with shaft ll, the various parts just described, which make a linkage connection between solenoid plunger 36 and gear 30, occupy the positions indicated in the dotted line counterparts of the solid line drawings of the parts described, as is illustrated in Figure '7. Reference numerals have not been applied to the dotted line counterparts as it is believed their meaning is obvious from an examination of Figure 7. When solenoid I2 is deenergized, gear member 30 falls downward under action of gravity and the influence of spring 52-, and becomes locked to shaft l I. Thus, when solenoid I2 is deenergized, the agitator shaft II can be driven by motor NI whereas when solenoid I2 is energized the agitator shaft ll is. prevented from being driven by motor l;

After the clothes have been wrung out, or before if desired, drain pump it can be brought into operation to drain the wash water from tub.

ll. Referring particularly to Figures 1 and 6, this drain pump is shown as including a housing or casing 55, an inlet pipe 55 and an outlet pipe 51. Although not shown, it is obvious that inlet pipe 56 will have a suitable hose connection thereto connected to a means. such as a sump, attached to tub H and outlet 51 will have a suitable drain hose connected thereto.

The pump casing 55 is suspended below support arm 26 and support plate 58, which is bolted to support arm 26, said casing being supported at two points of suspension. One of these points of suspension is a pivotal connection between a projection 59, which is rigidly attached to the pump casing 55, and a bracket member 55 which is afiixed to and extends downward from the support arm 25. This pivotal connection is indicated at 6!, see Figure 6. Adjacent an opposite end of the pump casing 55 from the pro-- jection 59, an arm 62 extends upward and has a projecting pin 63 extending therefrom. The projecting pin 63 engages the curved wall 64 of a slot 55 in a pivoted plate member The plate member 66 is pivotally connected at Bl to a downwardly extending bracket 58 attached to the underside of plate 58. The engagement of projecting pin 63 with the curved wall portion 64 of slot 65 furnishes the second point of'suspension for the pump casing 55 and this is a freely movable point of suspension, that is, the:

pump casing can be pivoted upward or downward about pivot point 6! in response to the action of the curved wall on the projecting pin 63 engaged thereby.

The drain pump is has a shaft til-upon which is mounted a wheel 55. stantially vertically below and adjacent to a second wheel ii. This latter wheel is suitably coupled to the shaft of driving motor Iii so that wheel '5! rotates when the-driving motor is energized. Should wheel to be brought into con- Solenoid. I5 is. attachedto the undersideof.

Wheel i0 is located sub-- supporting plate 58 by means such as bolts 75. The solenoid plunger 13 is pivotally connected at M to a slotted link member 75. Slotted link member i5 lies against a vertical downwardly extending plate '26, the latter being integrally connected to the supporting plate 58. Not only does link lie against plate 2'6 but this link is also supported by said plate by means of a guide pin T? on plate '15 which engages the walls of a slot E3 in link i5 and also by means of a striking pin 79 which is attached to link and which accommodates the projecting pin 53 supporting the pump casing 55 and which prevents the link '15 from binding the projecting pin 53 and. pre' venting its movement in slot 55. An edge 32 of the pivotal cam plate 66 lies in the path of movement of striking pin 19. Therefore, when the striking pin '59 is moved toward the pivotal cam plate 56 it strikes the edge 82 of this plate to pivot said plate about its pivot support. til. The wall 5d of slot 55 in cam plate 5t then exerts a camu'iing action on projecting pin which supports the pump casing 55, to move thi ,v pin and hence the casing vertically upward. This action can be observed in Figure 5 where the striking pin "#9 is shown as contacting the edge 232 of plate 6'5. The projecting pin (it is shown as having moved upward along the curved wall 6 The extent of the vertical movement imparted to the pump casing 55 is suiiicient to bring the driven wheel it into contact with the driving wheel ii. As these two wheels are closely adjacent to each other when the pump solenoid I5 is deenergized, the extent of the vertical movement of the pump casing is not great. Figure 6 shows in dotted line counterpart the extent of movement of the solid line portions of the pump casing 55.

When the pump solenoid I5 is deenergized, the slotted link :5, connected to the solenoid plunger 53, is biased to one extreme position, the left as viewed in Figure 4, by spring 83. This spring engages the pivot pin 14', connecting link 15 to the solenoid plunger 13, and spring 33 is attached to plate 16 by engaging a projection 85 thereon. Thus, by the biasing action of spring 33, the striking pin '49, attached to link i5, is held against one end of slot 85 and away from the edge 82 of the pivoted cam plate 66. This spacing assures that when striking pin 19 moves toward edge 82 of pivoted cam plate 56' it acquires suflicient momentum to strike the cam plate edge with an impact and thus forcefully move the pump casing upward. This spacing to allow impact I refer to as a lost motion connection. In order to counterbalance any tendency of the spring 33 to bind the solenoid plunger 73 against movement, as could occur if it were urged against the interior of the solenoid coil by the force exerted by spring 83 on pivot pin 15, an additional spring 84 is provided. This latter spring engages the end of pivot pin it, opposite from that engaged by spring-83, and also engages a projection 36 on the link 15.

A summary of the sequence of action of the parts just described for bringing the pump into operation is as follows. Normally, due to its weight, pump casing 55 hangs so that driven wheel 19 is out of contact with driving wheel N. This position is shown in Figure 4 and the solenoid is, of course, deenergized. When the solenoid I5 is energized, solenoid plunger '13 movesto theright, asviewed in Figure 4, and pulls link likewise to the right. This causes striking pin 19 tostrikeedge 82 of the pivotal cam plate 56' with an impact-to cause the lat- 7 ter plate to pivot downward. When cam plate 06 pivots, the wall or curved surface 64 of slot 65 in this plate engages the under side of the projecting pin 63 and raises this pin upward. This position is shown in Figure 5. When the projecting pin 63 is thus raised upward, the pump casing 55 is likewise raised and the driven wheel "I is brought into contact with the driving wheel II whereby the pump is brought into operation.

Having thus described the positive actuating means for disengaging the agitator from the driving motor and for engaging the drain pump to the driving motor, I will now describe the control circuit for obtaining selective action of the actuating means.

Referring to Figure 8, a selector switch 8'! is shown as including a bridging contact arm 88 and a plurality of contact buttons adapted to be bridged by said bridging arm contact. The bridging arm contact 88 is, of course, rotatable and is connected to one side 89 of a source of electric power such as a conventional 110-115 volt A. C. source. The other side 93 of the electric power source is connected by lead 9! to one side of the pump solenoid I5, by lead 92 to one side of the agitator solenoid I2, and by lead 93 to one side of the motor I0. The other side of the pump solenoid I is connected by lead 94, to contact button 95. Likewise, the other side of agitator solenoid I2 is connected, by lead 95, to contact button 91. Contact button 9? has a common connection 98 with a contact button 99, the latter being adjacent the contact button 95. The other side of the driving motor I0 is connected, by a lead I00, to contact button IOI. Leads I02 and I03 provide a common connection between contact buttons IOI, I04 and I05. A timer is connected by lead I06 to lead E00, and to lead 96 by a lead I01.

The operation of the above described circuit is as follows. When the switch bridging contact arm 88 is moved from Off position to Wash position, a circuit is completed from side 89 of the power source, through the bridging arm 88, through connecting leads I03, I02 and I00 to the driving motor I0, and from this motor through lead 93, to the other side 90 of the power source. In the Wash position, neither the agitator solenoid I2 nor the pump solenoid I5 is energized. However, by means of the timer I08, the agitator solenoid I2 can be brought into operation at the end of a predetermined washing period. The timer I09 is merely illustrated diagrammatically since the type of timer is not a part of the present invention it only being intended that a timer be provided which will complete a circuit through the agitator solenoid I2 at the end of a predetermined washing period even though the selector switching arm 88 is not moved to Wring or Drain position. The circuit through the timer is from lead I00, through lead I06, through the timer I98, from the timer through lead I01 to the agitator solenoid I2 and from this solenoid through lead 92 to the other side 90 of the electric power source.

When the bridging arm 88 is turned to Wring position, both the driving motor I0 and the agitator solenoid I2 are connected across the source of electric power. With the bridging arm 88 being shown in dotted outline as bridging contacts I04 A and 91, the circuit from side 89 of the power source and through the driving motor I0 to the other side 90 of the power source is the same as I described for the Wash" position of the bridging arm 88 excepting that lead I03 is omitted.

In addition, a circuit is completed from lead 89, through bridging arm 88 and lead 96, to the agitator solenoid I2 and from said solenoid through lead 92 to the other side of the power source. Thus, in this switch position the driving motor is energized and the agitator solenoid I2 is also energized to disconnect the agitator from the driving motor and hence stop its motion within the Washing tub I'l. The wringer can then be operated to wring out the clothes without having the agitator in motion during this operation.

When it is desired to remove the wash water from tub II, the selector switch is turned to Drain position to complete a circuit through the drain pump solenoid I5. Thus, the bridging arm contact 88 is shown in dotted outline as bridging contact IOI and contacts 95 and 99. Both contacts 95 and 99 are engaged in this switch position by virtue of the elongated contact portion I99 on the bridgin arm 88. The circuit through the driving motor I0 is the same as that described for the previous switch position, i. e. the 'v' iring" position, excepting that the connecting lead I02 is now omitted from the circuit and the circuit through the agitator solenoid I2 is the same as that described for the previous switch position excepting that the connecting lead 98 is now included in the circuit. In addition, a circuit is completed from lead 89 through bridging arm 88 and through lead 94 to pump solenoid I5, and from this solenoid through lead 9I to the other side 90 of the power source. Thus in the Drain position the motor I0 and both solenoids I2 and I5 are energized. This, of course, means that the drain pump is being driven by the motor i0 and is held in driven engagement by the solenoid I5 while the solenoid I2 is keeping the agitator out of driven engagement with the driving motor to prevent overloading of the agitator drive should clothes be left in the wash tub when water is being drained therefrom.

From the above description it will be seen that my novel washing machine control means not only includes electrically actuated linkages for causing positive engagement or disengagement of parts of a washing machine to or from a motive source but also includes an electrical control arrangement to cause these parts to operate selectively as desired. By means of the novel electrically actuated linkage mechanism, an impact force is produced to bring the parts into engagement or force them out of engagement with a motive source as desired, quickly and positively.

While I have shown and described particular embodiments of my invention, it will, of course, be understood that I do not wish to be limited thereto but that I intend to cover all modifications thereof which would be apparent to one skilled in the art and which come within the spirit and scope of my invention.

I claim as my invention:

1. In a control mechanism particularly adapted to control the Washing operation of washing machines, an oscillatable vertical drive shaft, a collar freely mounted on said shaft, means for oscillatably driving said collar, said collar being movable vertically along said shaft and having interengaging driving engagement therewith when in a lowermost position, means for moving said collar along said shaft from a lowermost position in drivin engagement with said drive shaft to an uppermost position out of driving engagement with said drive shaft during oscilu latable movement thereof including a vertically movable yoke having operative engagement with said collar, a vertically guided shaft having said yoke secured thereto, a solenoid having an armature, and impact means operatively connecte between said armature and shaft for positively raising said collar out of driving engagement with said shaft comprising a lever fulcrumed intermediate its ends, an operative connection from one end of said lever to said shaft, and an impact connection from said armature to the opposite end of said lever comprising a link pivoted to said armature adjacent one of its ends and having a slot extending vertically therealong, a slidable connection between said slot and lever, a spring connected between said armature and lever and biasing said lever into a lowermost position with respect to said slot, said spring being a relatively weak spring and energization of said solenoid effecting movement of said link to enh gage said lever with an impact at the upper end of said slot to positively disengage said collar from said drive shaft.

2. In a control mechanism particularly adapted to control the washing operation of washing machines, a vertical oscillatably movable drive shaft, an oscillating collar mounted on said shaft for free movement therealong from a lowermost position in interengaging driving connection with said shaft into an upper position free from driving connection with said shaft means for oscillatively driving said collar, means for axially moving said collar along said shaft into and out of driving engagement with said shaft including a rectilinearly movable yoke having operative engagement with said collar, a vertically guided shaft having said yoke secured thereto, a solenoid spaced from said shaft and having an armature extending parallel to said vertically guided shaft, impact means operatively connected between said armature and vertically guided shaft, for raising said collar out of interengaging driving connection with said drive shaft comprising a lever fulorumed intermediate its ends and having slidable and pivotal connection with said vertically guided shaft adjacent one of its ends, and an impact connection between said armature and the opposite end of said lever comprising a link pivoted to said armature and having a slot extending vertically therealong, a member on said lever slidably movable along said slot, a spring connected between said armature and lever and biasing said member into a lowermost position with respect to said slot, and a torsion spring adjacent the fulcrum of said lever and connected therewith to counterbalance the action of said first mentioned spring and initially holding said member at the bottom or said slot upon the initial taking up of tension of said first mentioned spring, and effecting engagement of said member on said lever by the upper margin of said slot with an impact action upon energization of said solenoid 3. A control mechanism particularly adapted to control the washing operation of washing machines and the like comprising a vertical shaft, an oscillatably driven gear freely mounted on said shaft, a collar depending from said gear, drive means on said collar and shaft interengagingly connecting said gear to oscillate said shaft, said gear also having a flanged collar ortion, means for moving said gear and collar upwardly along said shaft to disengage said drive means including a lever pivoted intermediate its ends, a yoke engageable with said flanged collar portion,

Cir

means connecting one end of said lever with said yoke, a solenoid adjacent the opposite end of said lever having a. plunger retractable with respect thereto upon energization of said solenoid, a link pivotally connected with said armature, a pin and slot connection between said link and lever and a weak spring biasing the pin of said pin and slot connection in an extreme position along the slot of said connection, whereby said link will travel the length of the slot of said pin and slot connection prior to actuation of said lever and will engage said lever with a sharp impact action upon energization of said solenoid.

4. A control mechanism particularly adapted to control the washing operation of washing machines and the like comprising a vertical shaft, a gear freely mounted on said haft, means for oscillatably driving said gear with respect to said shaft, a collar depending from said gear, a downwardly opening slot in said collar, a pin projecting from said shaft and adapted to be engaged by said slot, to oscillate said shaft from said gear, said gear also having a flanged collar portion, means for moving said gear and collar upwardly along said shaft during driving movement thereof to disengage said slot from said pin including a lever pivoted intermediate its ends, a yoke engageable with said flanged collar portion for vertically moving the same, a slidably guided pin connected with said yoke and having pivotal connection with one end of said lever, a solenoid adjacent the opposite end of said lever having a plunger retractable with respect thereto upon energization thereof, a link pivotally connected with said armature and having a slot therein, said lever having slidable engagement with said slot for movement therealong, a weak spring connected between said armature and lover and biasing said lever into engagement with the bottom of said slot, whereby said link will travel the length of said slot prior to engagement with said lever and will come into engagement with said lever with a sharp impact action upon energization of said solenoid.

CHARLES EVERETT MORGENSTERN.

REFERENCES CITED The following references are of record in the file of this patent:

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